The economic dimension of the conflict has now become the single most urgent threat to British households and businesses. While politicians argue about military aid, the real damage is quietly compounding in the form of slowing growth and stubbornly high inflation. The base-case scenario, which assumes a low-intensity conflict dragging on through 2026, already paints a grim picture. Global GDP growth is expected to decelerate to just 2.9% in 2026, down from 3.4% the previous year.
That would be the weakest annual performance since the Covid-19 pandemic brought the world economy to its knees. But that is the optimistic version. Under a black-sky scenario where oil prices spike to $170 per barrel, global growth would collapse further to only 2.2%. The difference between the best and worst cases amounts to more than $1 trillion in lost output – equivalent to wiping out Switzerland’s entire annual economy. And here is the brutal irony: higher commodity prices actually cushion the blow for the United States, which has become a major oil producer in its own right. America can absorb an energy shock far better than most. Britain cannot.
The United Kingdom is, without any serious contest, the most exposed major economy in Europe. Forecasts are no longer talking about a mild slowdown; they are pointing directly toward a textbook stagflation scenario. Stagflation – that toxic combination of stagnant growth and rising prices – is almost unavoidable for Britain at this stage. GDP growth is projected to crawl at just 0.5% in 2026. That is barely above recession territory and would feel like a recession to most working people. At the same time, CPI inflation is expected to hit 3.3% in the fourth quarter of 2026. That is a full 1.3 percentage points higher than pre-conflict forecasts. Put simply, Britons will be paying significantly more for everyday goods while their wages and job prospects flatline. The culprit is brutally straightforward: the country’s reliance on gas-fired power stations. With gas prices hovering around £1.40 per therm, any disruption in global energy markets feeds directly through to household bills within weeks. The International Monetary Fund has warned that a wage-price spiral could now take hold, locking in inflationary pressures for years. Once workers demand higher pay to keep up with energy bills, and businesses pass those costs back onto customers, the Bank of England finds itself trapped.
Globally, the picture is not much brighter, but Britain remains the outlier in all the wrong ways. Worldwide CPI is expected to peak at 4.2% in the fourth quarter of 2026. Under an escalation scenario, that would rise to 5.4% – a level not seen since mid-2024. Yet the real story is not the global average but the divergence between central banks. The Federal Reserve in the United States still has room to consider rate cuts, though those are not expected until late 2026. The Bank of England, however, faces the opposite direction. It will almost certainly be forced to raise interest rates further, ending the year with borrowing costs 50 basis points higher than pre-conflict projections. Market pricing already reflects this brutal reality. The implied change in interest rates over the next six months is just +7 basis points for the Fed, but a staggering +33 basis points for the Bank of England. Technically, that divergence supports the pound against the dollar in the very short term. But that is cold comfort. A slightly stronger pound does nothing to solve the underlying stagflation risk. It does not pay anyone’s heating bill.
Currency markets have already priced in Britain’s structural vulnerability. Options trading continues to show a higher premium for extreme moves in the pound than in the euro. That is not a random fluctuation. It confirms that global investors view the UK as structurally more sensitive to energy shocks than the eurozone. And they are right. The eurozone, for all its problems, has a larger service economy and more diversified energy imports. Britain has neither. Every spike in gas prices hits the UK harder, faster, and for longer. The question now is whether the current ceasefire holds. If energy prices fall back to pre-conflict levels before the end of 2026, the Bank of England could still pivot to rate cuts later that year. That would reopen a narrow window for growth. But if energy costs remain elevated – and every sign suggests they will – then the pound will carry an embedded energy risk premium for years to come. Stagflation will not be a temporary headline. It will become the new normal. And British families will be left holding the bag while policymakers on both sides of the Atlantic pretend they still have good options. They do not.
